fix distill

configs/det/ch_PP-OCRv3/ch_PP-OCRv3_det_dml.yml

@@ -35,7 +35,7 @@ Architecture:
         name: DBHead
         kernel_list: [7,2,2]
         k: 50
-    Teacher:
+    Student2:
       return_all_feats: false
       model_type: det
       algorithm: DB

doc/doc_ch/knowledge_distillation.md

@@ -448,7 +448,7 @@ Architecture:
 <a name="222"></a>
 #### 2.2.2 损失函数
 
-检测ch_PP-OCRv3_det_cml.yml蒸馏损失函数配置如下所示。相比较于ch_PP-OCRv3_det_distill.yml的损失函数配置，cml蒸馏的损失函数配置做了3个改动：
+检测ch_PP-OCRv3_det_cml.yml蒸馏损失函数配置如下所示。
 ```yaml
 Loss:
   name: CombinedLoss

doc/doc_en/knowledge_distillation_en.md

@@ -464,7 +464,7 @@ The key contains `backbone_out`, `neck_out`, `head_out`, and `value` is the tens
 
 <a name="222"></a>
 #### 2.2.2 Loss Function
-The distillation loss function configuration(`ch_PP-OCRv3_det_cml.yml`) is shown below. Compared with the loss function configuration of ch_PP-OCRv3_det_distill.yml, there are three changes:
+The distillation loss function configuration(`ch_PP-OCRv3_det_cml.yml`) is shown below.
 ```yaml
 Loss:
   name: CombinedLoss